(12分)已知的周长为,且.(I)求边的长;(II)若的面积为,求角的度数. 答案:解析:(I)由题意及正弦定理,得,,两式相减,得.(5分)(II)由的面积,得,(8分)由余弦定理,得 ,所以.(12分)
The new comers found it impossible to _______ themselves to the
climate sufficiently to make permanent homes in the new country.
A.adapt
B.suit
C.regulate
D.relate